![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/307403/image.png)
Fill area between plot and the 0-line?
178 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Hi,
I want to plot some data to show a difference to a reference value and i want that the curve above zero gets filled red and the area of the plot below zero gets filled with blue.
How do i do that?
0 Commenti
Risposta accettata
Akira Agata
il 1 Giu 2020
The following is an example:
% Sample data
x = linspace(0,4*pi,1000);
y = sin(x);
% Extract positive and negative part
yp = (y + abs(y))/2;
yn = (y - abs(y))/2;
% Plot the data using area function
figure
area(x,yp,'FaceColor','r')
hold on
area(x,yn,'FaceColor','b')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/307403/image.png)
Più risposte (2)
the cyclist
il 31 Mag 2020
3 Commenti
the cyclist
il 31 Mag 2020
The way I would do it is to use your data points to define polygons that are above zero, and polygons that are below zero, and then use patch or fill, to fill them in.
Image Analyst
il 1 Giu 2020
For a more general situation, see the FAQ: https://matlab.fandom.com/wiki/FAQ#How_do_I_shade_the_region_between_two_curves.3F
0 Commenti
Vedere anche
Categorie
Scopri di più su Surface and Mesh Plots in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!